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 sjwon1991 December 9, 2012 23:35

Solving Backstep Flow model using Excel

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Hi, I'm college student in Yonsei Univ, South Korea
My Professor gave us project to solving backstep flow model using Excel.
Exactly about du/dx=0 using streamline and vorticity
I hope there is someone who can help me

 mettler December 10, 2012 09:51

first you need to transform the equations into streamfunction/vorticity equations. Using Excel and finite difference

Guess a value for Streamfunction and vorticity (=0).
Using the entrance velocity get your new vorticity values.
Get the new streamfunction values from the new vorticity values.
Get the new velocities from the new stream functions

use the new velocities to get the new vorticity..etc etc

The hardest part is setting up the BCs for the vorticities at the corners.

 sjwon1991 December 10, 2012 14:44

Yeah..

Yeah.. Actually, I want to know about BCs,
Exactly about Right side, known as du/dx = 0
I set up the equation as Central Difference Method to get 2nd order Truncation Error...